Installation of Gree Multi GEN2 Heat Pumps in Outremont, Montreal
Discover how AirGreen transformed a triplex in Outremont with three Gree Multi GEN2 heat pumps. Quiet, efficient, and eligible for Hydro-Québec grants—comfort redefined!
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A successful collaboration to bring energy efficiency and comfort to a triplex
The context: an effective solution for a shared space
At AirGreen, we are proud to offer custom HVAC solutions perfectly tailored to the unique needs of our clients. This recent installation in Outremont, Montreal, is a perfect example of how we transform a residential triplex into a space of comfort, efficiency, and modernity. The project involved installing three Gree Multi GEN2 two-zone heat pumps, one for each apartment in a shared triplex, providing unmatched heating and cooling to three delighted neighbors.
The building’s shared roof was the ideal location for this installation, hosting three 24,000 BTU outdoor compressors and six indoor units (two per apartment). Our team worked precisely to integrate the heat pumps harmoniously while respecting the building’s aesthetics and structural integrity. Each owner not only benefited from a system tailored to their apartment’s layout but also received a generous group discount—proof of our commitment to providing cost-effective solutions.
Why the Gree Multi GEN2 heat pump was the perfect choice
The Gree Multi GEN2 heat pump is known for its exceptional performance and energy efficiency. Here’s why it was perfectly suited for this project:
- Two-zone capacity: Each system supports up to two indoor units, perfectly meeting the varied heating and cooling needs of the triplex apartments.
- Powerful yet quiet operation: Despite their compact size, the outdoor compressors operate at a discreet noise level of 58 dB(A), ensuring peace and quiet for all residents.
- Unmatched efficiency: With a SEER of 22.0, these heat pumps are designed to significantly reduce energy consumption while maintaining optimal indoor comfort.
- Robust heating capacity: These systems operate efficiently in extreme conditions, providing reliable heating even at temperatures as low as -30°C.
- WiFi compatibility: All indoor units come equipped with WiFi functionality, allowing residents to easily control their comfort settings remotely.
The installation process: a harmonious collaboration
Installing three separate systems in the same triplex is no easy task. However, our team loves challenges, and this project showcased our expertise in multi-unit installations.
Step 1: Strategic planning and layout
We began with a thorough site inspection to determine the optimal placement of the outdoor compressors and indoor units. The shared roof was chosen for its accessibility and capacity to host the three systems without compromising aesthetics or performance.
Step 2: Precise installation of outdoor units
The three 24,000 BTU compressors were carefully mounted on custom supports designed to ensure their stability and protect them from the elements. Each compressor was positioned to maximize airflow and minimize noise transmission to the apartments below.
Step 3: Customized indoor solutions
Each apartment received two indoor units, strategically placed to ensure even distribution of heating and cooling throughout the space. These 12,000 BTU units were installed with meticulous attention to detail, ensuring seamless integration with the existing décor.
Step 4: Insulated piping and electrical connections
To guarantee optimal performance and increased longevity, we used high-quality insulated pipes and robust electrical connections. The connections were carefully routed to preserve the building’s aesthetics, and all penetrations were precisely sealed to prevent heat loss or air infiltration.
Step 5: Testing and client orientation
After completing the installation, our team conducted rigorous tests to ensure the systems operated perfectly. We also provided the owners with comprehensive training, showing them how to use the WiFi controls and maintain their new heat pumps.
Eco-friendly and cost-effective: a winning solution for all
One of the most exciting aspects of this project was the eligibility of the Gree Multi GEN2 heat pumps for the Hydro-Québec LogisVert rebate. Each system qualified for a generous $2,832 rebate, significantly reducing installation costs for the owners. This, combined with the group discount we offered, made this project not only an ecological choice but also a financially advantageous solution.
Customer feedback: happy neighbors and satisfied clients
The owners were thrilled with the results. Here’s what one of them said:
"We were initially hesitant about the logistics of installing three separate systems, but AirGreen made the process so simple. The group discount was a huge bonus, and we love how quiet and efficient the heat pumps are. It has changed our daily life in the building!"
This project reinforced our belief in the power of collaboration. By working closely with the residents, we delivered a solution that exceeded their expectations in every way.
Technical specifications of the Gree Multi GEN2 heat pump
To better understand the capabilities of the Gree Multi GEN2 heat pumps, here are some additional technical specifications:
- Cooling capacity: 24,000 BTU
- Heating capacity: Operates efficiently at temperatures as low as -30°C
- Dimensions (outdoor unit): 38” x 15.88” x 26”
- Efficiency: SEER 22.0, Energy Star® certified
- Refrigerant: R-410A
- Noise level (outdoor unit): 58.0 dB(A)
- Warranty: 12 years on compressor and parts
- WiFi compatibility: Standard on all indoor units
Why choose AirGreen for your HVAC needs?
At AirGreen, we don’t just do installations: we build lasting relationships with our clients. Here’s what sets us apart:
- Trusted expertise: With years of experience in the HVAC industry, our team has the knowledge and skills to handle even the most complex installations.
- Custom solutions: We understand that every project is unique, and we take the time to design solutions that meet your specific needs.
- Commitment to quality: From the products we use to the services we provide, quality is at the heart of everything we do.
- Exceptional customer service: Your satisfaction is our top priority. We are always here to answer your questions and provide support long after installation.
Conclusion: transforming comfort in Outremont
This installation in Outremont, Montreal, is a testament to what is possible when expertise, collaboration, and cutting-edge technology come together. The Gree Multi GEN2 heat pumps have not only improved the comfort and efficiency of this triplex but also demonstrated the value of choosing AirGreen for your HVAC needs.
If you are considering upgrading your heating and cooling system, don’t hesitate to contact us. Let’s work together to create the perfect solution for your home or business.
The job tools
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
How the job unfolds
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
What we check on a job like this one
Each number is a point we check on site. Switch between summer and winter to watch air and heat move.
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
Is your home ready?
Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
The right pages, at the right time
Four statements: true or false?
It all comes down to details you have just seen.
1. In heating mode, the outdoor unit can produce water.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).